Finding the Fourth Proportional to 39,901.98, 55,064.88 and 21,752.60

Step by Step Solution

1. Step 1: Write the proportion equation
   39,901.98 : 55,064.88 = 21,752.60 : x
2. Step 2: Convert to fraction form
   39,901.98/55,064.88 = 21,752.60/x
3. Step 3: Cross multiply
   39,901.98x = 55,064.88 × 21,752.60
4. Step 4: Simplify right side
   39,901.98x = 1,197,804,308.69
5. Step 5: Solve for x
   x = 1,197,804,308.69/39,901.98
6. Step 6: Final answer
   x = 30,018.67